Yesterday I suddenly couldn't start my wow client anymore as opengl was apparently broken. After a great deal of searching a few suggestions came up.

Make sure nvidia 32bit libraries are installed

I have no idea what this means. I know the nVidia distributed drivers will install these if you let them, but as I'm using the Ubuntu package and not the distributed drivers this made no sense to me.

Update to the latest Wine

This had no effect, but forced me to finally do the update I have been putting off. So I guess that was alright.

As none of the suggestions had any effect, I started digging in /usr/lib32 and found the libGL.so and libGL.so.1 was linking to the Mesa versions and not the nvidia versions. Changing the links finally made it work again.

I'm still a bit surprised it suddenly stopped working, but I guess that's to be expected on a beta distribution.